Balanced valve for steam-engines



W. J. INNIS. Balanced Valve for Steam Engines.

NJETERS, PHOTO-LITMDGRAPHER, WASHXNGYON D. C.

UNITED STATES PATENT OFFICE.

WILLIAM J. INNIS, OF OIL CITY, PENNSYLVANIA.

BALANCED VALVE FOR STEAM-ENGINES.

SPECIFICATION forming part of lLetters Patent No. 233,351, dated October 19, 1880.

Application filed August 20, 1877.

To all whom it may concern:

Be it known that I, WILLIAM J. INNIs, of Oil City, in the county ot' Venango and State of Pennsylvania, have invented a new and useful Improvementin Balanced Valves for Steam- Engines, which is fully set forth and illustrated in this specification and the accompanying drawings.

The object of my invention is to produce a 1o piston-valve for a steam-engine which shall be balanced, simple in construction, not liable to get out of order, and subject to but little wear. The invention consists of a hollow piston with closed ends provided with suitable steaml. ports.

, It consists ot' i'our parts united by narrow tie-bars or bridges, the spaces between which form the ports.

In the laccompanying drawings, Figure l is zo a side view ot' the valve. Fig. 2 is a crosssection on the line :v Fig. 3 is a longitudinal section, showing the valve in its seat or steam-chest.

A represents the valve, consisting of four 2 5 parts, a, b, c, and d, which are united by bridges B, and the spaces between which form the ports C and O for the passage of the steam. This valve isgenerall y made cylindrical, and when so formed the above construetion is to permit the .valve to rotate and still retain uniform passages for steam.

rl`he ends or heads e e are closed, the whole being cast in one piece. The ports can therefore never change their relative position.

3 5 The inner head7 e', is recessed to receive the round head f of the stein D, which is held in its place by a flange or plate, g, secured by suitable bolts IL.

It will be observed that the head f is less in 4o size than its receptacle, and the aperture in the plate g is somewhat larger than the stem D; but the plate g closely presses the head f of the stem D to head e' ofthe piston, so that in the movement of the valve there is no lost motion; but in case the stem D is not exactly in the center of its stutng-box the head f will adjust itself in the head e of the valve, so there will be no strain between the valve and its stein and no binding on either of them.

The steam is admitted through the pipe E, 5o

of wearing-surface in proportion to its weight. 6o

I claiml. A balanced piston-valve, A, with'elosed ends, a series ot' longitudinal openings, C, in the center, and a series of transverse openings, O, at each end, arranged substantially as shown, and for the purpose described.

2. A balanced piston-valve, A,formed of the combination of t'our cylindrical parts, a b c d, bridges B to unite said parts, a closed dat head, e, a recessed head, j', and a perforated 7o cap. g, substantially as and for the purpose dcscribed.

3. The valve-stem D, provided with a head,

f, in combination with a balanced piston-valve, A, having a recess for the head f and aperture in the cap for the stem D, larger in their diameters than said head f and stem D, substantially as shown, and for the purpose specied.

4. A hollow balanced piston-valve having 8o closed ends, a series of longitudinal ports in the center, and a series of transverse ports adjoining each end, in combination with a valvecasing or steam-chest having annular recess in the center and adjoining each end, substan 8 5 tially as and for the purpose described.

WILLIAM J. INNIS.

Witnesses:

E. F. HOWELL, JAMES G. BoYcE. 

